/**
* @brief TWI master driver event types.
*/
typedef enum
{
NRF_DRV_TWI_EVT_DONE, ///< Transfer completed event.
NRF_DRV_TWI_EVT_ADDRESS_NACK, ///< Error event: NACK received after sending the address.
NRF_DRV_TWI_EVT_DATA_NACK ///< Error event: NACK received after sending a data byte.
} nrf_drv_twi_evt_type_t;
is there any event triggers when i receive the data?
/**
* Copyright (c) 2014 - 2021, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/** @file
*
* @defgroup blinky_example_main main.c
* @{
* @ingroup blinky_example
* @brief Blinky Example Application main file.
*
* This file contains the source code for a sample application to blink LEDs.
*
*/
#include <stdbool.h>
#include <stdint.h>
#include "nrf_delay.h"
#include "boards.h"
#include "DAC.h"
#include "stdio.h"
//#include "main.h"
#include "nrf_drv_spi.h"
#include "nrf_gpio.h"
#include <string.h>
//#include "nrf_twi.h"
//#include "nrfx_twi.h"
#include "nrf_drv_twi.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
//#define TWI_ADDRESSES 127
#define EEPROM_ADDR 0xA0
#define SPI_INSTANCE 0 /**< SPI instance index. */
nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE); /**< SPI instance. */
bool spi_xfer_done;
#define TWI_INSTANCE 1
nrf_drv_twi_t twi = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE);
bool m_xfer_done = false;
void spi_event_handler(nrf_drv_spi_evt_t const * p_event,
void * p_context)
{
spi_xfer_done = true;
// NRF_LOG_INFO("Transfer completed.");
/* if (m_rx_buf[0] != 0)
{
NRF_LOG_INFO(" Received:");
NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
}*/
}
void Spi0_init(void)
{
nrf_drv_spi_config_t spi_config ;
spi_config.ss_pin = SPI_SS_PIN;
spi_config.miso_pin = SPI_MISO_PIN;
spi_config.mosi_pin = SPI_MOSI_PIN;
spi_config.sck_pin = SPI_SCK_PIN;
spi_config.frequency = NRF_SPI_FREQ_4M;
spi_config.mode = NRF_SPI_MODE_0;
spi_config.bit_order = NRF_SPI_BIT_ORDER_MSB_FIRST;
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, NULL, NULL));
}
void twi_event( nrf_drv_twi_evt_t const * p_event_twi ,void *p_context_twi)
{
switch(p_event_twi->type)
{
case NRF_DRV_TWI_EVT_DONE :
m_xfer_done = true;
break;
default:
break;
}
}
void I2C_1_init(void)
{
uint32_t err_code;
nrf_drv_twi_config_t const config = {
.scl = ARDUINO_SCL_PIN,
.sda = ARDUINO_SDA_PIN,
.frequency = NRF_TWI_FREQ_400K,
.interrupt_priority = APP_IRQ_PRIORITY_LOWEST,
.clear_bus_init = false,
};
err_code = nrf_drv_twi_init(&twi,&config,NULL,NULL);
APP_ERROR_CHECK(err_code);
nrf_drv_twi_enable(&twi);
}
/**
* @brief Function for application main entry.
*/
int main(void)
{
uint32_t err_code;
// uint8_t address;
// uint8_t sample_data;
uint8_t Tx_buffer[3] = {0};
uint8_t Rx_buffer[3] = {0};
bool detected_device = false;
/* Configure board. */
bsp_board_init(BSP_INIT_LEDS);
// Spi0_init();
I2C_1_init();
/* err_code = nrf_drv_twi_rx(&twi, EEPROM_ADDR, &sample_data, sizeof(sample_data));
if (err_code == NRF_SUCCESS)
{
detected_device = true;
NRF_LOG_INFO("TWI device detected at address 0x%x.", address);
}
NRF_LOG_FLUSH();
if (!detected_device)
{
NRF_LOG_INFO("No device was found.");
NRF_LOG_FLUSH();
}*/
Tx_buffer[0] = 0x00;
Tx_buffer[1] = 0x00;
Tx_buffer[2] = 0x12;
err_code = nrf_drv_twi_tx(&twi, (EEPROM_ADDR >> 1), Tx_buffer, 3,0);
if (err_code == NRF_SUCCESS)
{
detected_device = true;
NRF_LOG_INFO("TWI device detected at address 0x%x.", EEPROM_ADDR);
}
NRF_LOG_FLUSH();
if (!detected_device)
{
NRF_LOG_INFO("No device was found.");
NRF_LOG_FLUSH();
}
nrf_delay_ms(1000);
err_code = nrf_drv_twi_tx(&twi, (EEPROM_ADDR >> 1), Tx_buffer, 2,0);
err_code = nrf_drv_twi_rx(&twi, (EEPROM_ADDR >> 1), Rx_buffer, 1);
if (err_code == NRF_SUCCESS)
{
detected_device = true;
NRF_LOG_INFO("TWI device detected at address 0x%x.",EEPROM_ADDR );
}
NRF_LOG_FLUSH();
if (!detected_device)
{
NRF_LOG_INFO("No device was found.");
NRF_LOG_FLUSH();
}
/* Toggle LEDs. */
while (true)
{
/* for (int i = 0; i < LEDS_NUMBER; i++)
{
bsp_board_led_invert(i);
nrf_delay_ms(500);
}*/
/* for(uint16_t i = 500; i <= 2500; i += 500)
{
Dac_Input(channel_A,i);
nrf_delay_ms(2000);
}*/
}
}
/**
*@}
**/
when i initialise the twi with event handler transmission part works fine but receiving wont happen but if i use polling it works fine.
is there any events triggered when i receive the data?
Yes,
you should receive NRF_DRV_TWI_EVT_DONE event and handle the event to check if you received any data like this
case NRF_DRV_TWI_EVT_DONE:
if (p_event->xfer_desc.type == NRF_DRV_TWI_XFER_RX)
{
app_specific_data_handler(m_sample);
}
break;
Check the examples\peripheral\twi_sensor\main.c example for the reference of its usage.
Yes,
you should receive NRF_DRV_TWI_EVT_DONE event and handle the event to check if you received any data like this
case NRF_DRV_TWI_EVT_DONE:
if (p_event->xfer_desc.type == NRF_DRV_TWI_XFER_RX)
{
app_specific_data_handler(m_sample);
}
break;
Check the examples\peripheral\twi_sensor\main.c example for the reference of its usage.
NRF_DRV_TWI_EVT_DONE this indicates tranfer complete event right?
yes, that is correct.
when i start receiving the data is there any intterupt will trigger?
/**
* Copyright (c) 2014 - 2021, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/** @file
*
* @defgroup blinky_example_main main.c
* @{
* @ingroup blinky_example
* @brief Blinky Example Application main file.
*
* This file contains the source code for a sample application to blink LEDs.
*
*/
#include <stdbool.h>
#include <stdint.h>
#include "nrf_delay.h"
#include "boards.h"
#include "DAC.h"
#include "stdio.h"
//#include "main.h"
#include "nrf_drv_spi.h"
#include "nrf_gpio.h"
#include <string.h>
//#include "nrf_twi.h"
//#include "nrfx_twi.h"
#include "nrf_drv_twi.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_drv_uart.h"
#include"nrf_uart.h"
//#define TWI_ADDRESSES 127
#define EEPROM_ADDR 0xA0
#define SPI_INSTANCE 0 /**< SPI instance index. */
nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE); /**< SPI instance. */
bool spi_xfer_done;
#define TWI_INSTANCE 1
nrf_drv_twi_t twi = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE);
static volatile bool m_xfer_done = false;
#define UART_INSTANCE 0
nrf_drv_uart_t uart = NRF_DRV_UART_INSTANCE(UART_INSTANCE);
bool uart_xfer_done = false;
uint8_t sample_data = 12;
void spi_event_handler(nrf_drv_spi_evt_t const * p_event,
void * p_context)
{
spi_xfer_done = true;
// NRF_LOG_INFO("Transfer completed.");
/* if (m_rx_buf[0] != 0)
{
NRF_LOG_INFO(" Received:");
NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
}*/
}
void Spi0_init(void)
{
nrf_drv_spi_config_t spi_config ;
spi_config.ss_pin = SPI_SS_PIN;
spi_config.miso_pin = SPI_MISO_PIN;
spi_config.mosi_pin = SPI_MOSI_PIN;
spi_config.sck_pin = SPI_SCK_PIN;
spi_config.frequency = NRF_SPI_FREQ_4M;
spi_config.mode = NRF_SPI_MODE_0;
spi_config.bit_order = NRF_SPI_BIT_ORDER_MSB_FIRST;
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, NULL, NULL));
}
void twi_event( nrf_drv_twi_evt_t const * p_event_twi ,void *p_context_twi)
{
uint32_t err_code;
uint8_t Tx_buffer[3] = {0};
uint8_t Rx_buffer[3] = {0};
bool detected_device = false;
switch(p_event_twi->type)
{
case NRF_DRV_TWI_EVT_DONE :
if (p_event_twi->xfer_desc.type == NRF_DRV_TWI_XFER_RX)
{
// err_code = nrf_drv_twi_tx(&twi, (EEPROM_ADDR >> 1), Tx_buffer, 2,0);
// err_code = nrf_drv_twi_rx(&twi, (EEPROM_ADDR >> 1), Rx_buffer, 1);
m_xfer_done = true;
}
break;
default:
break;
}
}
void uart_handler(nrf_drv_uart_event_t *p_event)
{
if (p_event->type == NRF_DRV_UART_EVT_TX_DONE)
{
uart_xfer_done =true;
}
if (p_event->type == NRF_DRV_UART_EVT_RX_DONE)
{
uart_xfer_done =true;
}
}
void I2C_1_init(void)
{
uint32_t err_code;
nrf_drv_twi_config_t const config = {
.scl = ARDUINO_SCL_PIN,
.sda = ARDUINO_SDA_PIN,
.frequency = NRF_TWI_FREQ_400K,
.interrupt_priority = APP_IRQ_PRIORITY_LOWEST,
.clear_bus_init = false,
};
err_code = nrf_drv_twi_init(&twi,&config,twi_event,NULL);
APP_ERROR_CHECK(err_code);
nrf_drv_twi_enable(&twi);
}
void UART_init(void)
{
uint32_t err_code;
nrf_drv_uart_config_t const config = {
.pselrxd = SER_CON_RX_PIN,
.pseltxd = SER_CON_TX_PIN,
.pselrts = SER_CON_RTS_PIN,
.pselcts = SER_CON_CTS_PIN,
.baudrate = NRF_UART_BAUDRATE_115200,
.hwfc = NRF_UART_HWFC_DISABLED,
.parity = NRF_UART_PARITY_INCLUDED,
.interrupt_priority = 6,
};
err_code = nrf_drv_uart_init(&uart,&config,uart_handler);
}
void Mem_Read(void)
{
uint32_t err_code;
uint8_t Tx_buffer[3] = {0};
uint8_t Rx_buffer[3] = {0};
bool detected_device = false;
err_code = nrf_drv_twi_tx(&twi, (EEPROM_ADDR >> 1), Tx_buffer, 2,0);
err_code = nrf_drv_twi_rx(&twi, (EEPROM_ADDR >> 1), Rx_buffer, 1);
if (err_code == NRF_SUCCESS)
{
detected_device = true;
NRF_LOG_INFO("TWI device detected at address 0x%x.",EEPROM_ADDR );
}
NRF_LOG_FLUSH();
if (!detected_device)
{
NRF_LOG_INFO("No device was found.");
NRF_LOG_FLUSH();
}
}
void Mem_Write(void)
{
uint32_t err_code;
uint8_t Tx_buffer[3] = {0};
uint8_t Rx_buffer[3] = {0};
bool detected_device = false;
Tx_buffer[0] = 0x00;
Tx_buffer[1] = 0x00;
Tx_buffer[2] = 0x12;
err_code = nrf_drv_twi_tx(&twi, (EEPROM_ADDR >> 1), Tx_buffer, 3,0);
if (err_code == NRF_SUCCESS)
{
detected_device = true;
NRF_LOG_INFO("TWI device detected at address 0x%x.", EEPROM_ADDR);
}
NRF_LOG_FLUSH();
if (!detected_device)
{
NRF_LOG_INFO("No device was found.");
NRF_LOG_FLUSH();
}
nrf_delay_ms(1000);
}
/**
* @brief Function for application main entry.
*/
int main(void)
{
uint32_t err_code;
uint8_t Tx_buffer[3] = {0};
uint8_t Rx_buffer[3] = {0};
bool detected_device = false;
/* Configure board. */
bsp_board_init(BSP_INIT_LEDS);
// Spi0_init();
I2C_1_init();
UART_init();
Mem_Write();
Mem_Read();
/*
Tx_buffer[0] = 0x00;
Tx_buffer[1] = 0x00;
Tx_buffer[2] = 0x12;
err_code = nrf_drv_twi_tx(&twi, (EEPROM_ADDR >> 1), Tx_buffer, 3,0);
if (err_code == NRF_SUCCESS)
{
detected_device = true;
NRF_LOG_INFO("TWI device detected at address 0x%x.", EEPROM_ADDR);
}
NRF_LOG_FLUSH();
if (!detected_device)
{
NRF_LOG_INFO("No device was found.");
NRF_LOG_FLUSH();
}
nrf_delay_ms(1000);
err_code = nrf_drv_twi_tx(&twi, (EEPROM_ADDR >> 1), Tx_buffer, 2,0);
err_code = nrf_drv_twi_rx(&twi, (EEPROM_ADDR >> 1), Rx_buffer, 1);
if (err_code == NRF_SUCCESS)
{
detected_device = true;
NRF_LOG_INFO("TWI device detected at address 0x%x.",EEPROM_ADDR );
}
NRF_LOG_FLUSH();
if (!detected_device)
{
NRF_LOG_INFO("No device was found.");
NRF_LOG_FLUSH();
}*/
err_code = nrf_drv_uart_tx(&uart,&sample_data,sizeof(sample_data));
/* Toggle LEDs. */
while (true)
{
/* for (int i = 0; i < LEDS_NUMBER; i++)
{
bsp_board_led_invert(i);
nrf_delay_ms(500);
}*/
/* for(uint16_t i = 500; i <= 2500; i += 500)
{
Dac_Input(channel_A,i);
nrf_delay_ms(2000);
}*/
// err_code = nrf_drv_uart_rx(&uart,&sample_data,1);
}
}
/**
*@}
**/
when i initialise the twi with twi handler data transfer works fine but data receive not working? but when i intialise the twi with NULL for event handler it works fine
I do not see anything in your twi_event that will make it behave different than when not using the event handler at all.
Can you share SDK version you using? can it be reproduced on the DK?